Notes on The Apocalypse of St. John the Apostle (Author Bishop Richard Challoner (ed.))
13:3 One of his heads, etc: Some understand this of the mortal wound, which the idolatry of the Roman empire (signified by the sixth head) received from Constantine; which was, as it were, healed again by Julian the Apostate.
Original Douay-Rheims from Project Gutenberg - Massive cleanup of OCR problems and editing done locally.